SBR - Sequencing Batch Reactor Systems for Wastewater Treatment

SBR - Sequencing Batch
Reactor technology is well known for its simplicity and low cost.
It has been widely used for municipal and industrial wastewater
treatment applications to meet specific effluent requirements.

Sequencing Batch Reactor System is a fill and draw Activated
Sludge System. SBR process uses high-efficiency oxygen transfer
aeration equipment to satisfy the high-rate oxygen consumption
requirement at the beginning of the "fill" and "aeration"
cycles. SBR is efficient in carbonaceous pollutant removal, and
is easily modified to satisfy nutrient removal of nitrogen (N)
and phosphorous (P). Because the fill, aeration, settlement and
and draw take place in the same reaction tank, thus SBR tank itself
also serves as the clarifier itself.

A process flow diagram of a typical SBR system is as shown above.
The headworks process is similar to that of activated sludge process,
influent storage or equalization may not be required since the
SBR tank itself can serve as a buffer tank and is able to take
some kind of shock loadings. Sludge treatment processes are similar
to that of a activated sludge system. However the treated effluent
may need to be equalized to ensure the effluent quality is suitable
for disposal or for further advanced treatment.

The processes inside the Sequencing Batch Reactor system include
the following:

Fill - raw sewage or wastewater is filled into the SBR tank,
can be mixed, or aerated